阳离子对弗氏盐法除氯产物特性的研究

doi:10.19964/j.issn.1006-4990.2024-0256

Abstract

Abstract:

The effects of cations（Na⁺，Ca²⁺，Mg²⁺） on crystal structure，settling performance，dewaterability and ion exchange properties of the chloride removal precipitates were studied in order to improve their recovery potential.It was found that in terms of crystal structure，the FS layers formed in MgCl₂ and CaCl₂ solutions were more widely spaced，the FS was more unstable，and the interlayer ions were prone to ion exchange.In addition，the FS products in MgCl₂ showed the largest grain size，which could be attributed to the grain boundaries with doping of Mg²⁺ to change the grain boundary mobility and thereby the local grain growth rate by several orders of magnitude.In addition，differences in FS settling performance produced by the three solutions existed due to differences in Zeta potential.The dosing of PAM could increase the settling velocity by increasing the average particle size of the precipitates，but it did not improve the settling performance much.PAM significantly improved the settling performance of the chloride removal sludge of MgCl₂.The addition of 200 mg/L PAM to the dechlorinated precipitate in MgCl₂ solution reduced SV₁₂₀ from 100.0% to 43.0%.Among the three mechanical dewatering methods，vacuum，plate and frame，and centrifugal，the chloride removal sludge of NaCl was suitable for vacuum dewatering，while the dechlorinated sludge of CaCl₂ and MgCl₂ was suitable for plate and frame dewatering，and the addition of PAM could reduce the bound water content of the sludge cake.

Key words: Friedel′s salt, settling performance, dewaterability, ion exchange property

CLC Number:

TQ124.4

CHEN Chengqi, ZHANG Yiwei, ZHAO Xiaodan, ZHU Qiaoling, ZHOU Zhen, XIA Qing. Study on effect of cations on properties of chloride removal products by Friedel′s salt process[J]. Inorganic Chemicals Industry, 2025, 57(6): 70-76.

Figures/Tables 7

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References 25

1	江晓.层状双金属氢氧化物/氧化物脱除废水中氯离子的研究［D］.合肥：合肥工业大学，2020.
	JIANG Xiao.Study on removal of chloride ion from wastewater by layered bimetallic hydroxide/oxide［D］.Hefei：Hefei University of Technology，2020.
2	EZUGBE E O， TETTEH E K， RATHILAL S，et al.Desalination of municipal wastewater using forward osmosis［J］.Membranes，2021，11（2）：119.
3	周银芳.SBR工艺处理高含盐采油废水试验研究［D］.西安：长安大学，2010.
	ZHOU Yinfang.Experimental study on treatment of high salinity oil production wastewater by SBR process［D］.Xi′an：Chang′an University，2010.
4	孙凤娟，刘万超，闫琨，等.离子交换树脂法去除脱硫废水中氯离子的研究［J］.无机盐工业，2019，51（6）：45-48.
	SUN Fengjuan， LIU Wanchao， YAN Kun，et al.Removal of chloride ion from desulfurization wastewater by ion-exchange resin［J］.Inorganic Chemicals Industry，2019，51（6）：45-48.
5	许献智.含氯离子工业废水处理技术研究进展［J］.安徽化工，2021，47（3）：17-19，23.
	XU Xianzhi.Progress on the technology of treating chlorine-containing industrial wastewater［J］.Anhui Chemical Industry，2021，47（3）：17-19，23.
6	高美娟，赵晓玲，李艳.叔胺-CO₂对水中氯离子萃取过程研究［J］.化学工程师，2021，35（6）：37-41，55.
	GAO Meijuan， ZHAO Xiaoling， LI Yan.Study on extraction of chloride ion from water by tertiary amine-CO₂ ［J］.Chemical Engineer，2021，35（6）：37-41，55.
7	POLO A M S， LOPEZ-PEÑALVER J J， SÁNCHEZ-POLO M，et al.Halide removal from water using silver doped magnetic-microparticles［J］.Journal of Environmental Management，2020，253：109731.
8	GUO Jiaming， ZHOU Zhen， MING Qiang，et al.Recovering precipitates from dechlorination process of saline wastewater as poly aluminum chloride［J］.Chemical Engineering Journal，2022，427：131612.
9	WANG Yafan， ZHANG Yongsheng， WANG Tao，et al.Friedel′s salts synthesis and adsorption applications in the removal of As（Ⅲ） and Se（Ⅳ） from desulfurization wastewater［J］.Industrial & Engineering Chemistry Research，2023，62（35）：13762-13772.
10	CHI Lin， WANG Zheng， SUN Yuan，et al.Removal of cobalt ions from waste water by Friedel′s salt［J］.Materials Research Express，2019，6（1）：015508.
11	PAUL B， CHANG W.Mayenite-to-hydrocalumite transformation for the removal of chloride from salinized groundwater and the recycling potential of spent hydrocalumite for chromate removal［J］.Desalination，2020，474：114186.
12	胡成，刘梦，向玮衡，等.CaCl₂和MgCl₂及其复合溶液制备α-半水石膏［J］.无机盐工业，2024，56（7）：112-117.
	HU Cheng， LIU Meng， XIANG Weiheng，et al.Preparation of α-hemihydrate gypsum by CaCl₂ and MgCl₂ and their composite solutions［J］.China Industrial Economics，2024，56（7）：112-117.
13	RHEINHEIMER W， HOFFMANN M J.Grain growth in perovskit- es：What is the impact of boundary transitions？［J］.Current Opinion in Solid State and Materials Science，2016，20（5）：286- 298.
14	陈婉琦，张芹，王天正，等.絮凝剂对细粒铁精矿沉降效果的影响［J］.金属矿山，2015（10）：95-99.
	CHEN Wanqi， ZHANG Qin， WANG Tianzheng，et al.Influence of flocculants on sedimentation effect of ultrafine hematite［J］.Metal Mine，2015（10）：95-99.
15	张艺邺，崔宝玉，王小宇，等.北营铁尾矿动态沉降试验研究［J］.矿产保护与利用，2023，43（3）：160-167.
	ZHANG Yiye， CUI Baoyu， WANG Xiaoyu，et al.Experimental dynamic settlement of beiying iron tailings［J］.Conservation and Utilization of Resources Mineral，2023，43（3）：160-167.
16	唐宇农，杨琥.新型复合聚硅酸钛锌混凝剂的合成、表征及混凝性能［J］.环境化学，2021，40（5）：1524-1534.
	TANG Yunong， YANG Hu.Synthesis，characterization，and coagulation performance of a novel polysilicic-titanium-zinc composite coagulant［J］.Environmental Chemistry，2021，40（5）：1524-1534.
17	许小洁，吴纯德，叶健，等.基于Zeta电位的硅藻土复配剂强化混凝研究［J］.环境科学与技术，2010，33（10）：151-153，165.
	XU Xiaojie， WU Chunde， YE Jian，et al.Enhanced coagulation by diatomite blends based on Zeta potential［J］.Environmental Science & Technology，2010，33（10）：151-153，165.
18	梅至雅.化学和生物调理对市政污泥脱水性能的影响研究［D］.杭州：浙江大学，2020.
	MEI Zhiya.Effect of chemical and biological conditioning on dewatering performance of municipal sludge［D］.Hangzhou：Zhejiang University，2020.
19	李晓道.固化-絮凝-抽滤处理盾构工程废弃泥浆的脱水及强化机理［D］.镇江：江苏科技大学，2023.
	LI Xiaodao.Dehydration and strengthening mechanism of solidification-flocculation-filtration treatment of waste slurry from shield engineering［D］.Zhenjiang：Jiangsu University of Science and Technology，2023.
20	ZHU Zhongfan， WANG Hongrui， YU Jingshan，et al.On the kaolinite floc size at the steady state of flocculation in a turbulent flow［J］.PLoS One，2016，11（2）：e0148895.
21	陆香玉，俞海祥，陈亚，等.化学絮凝与电絮凝调理污泥脱水性能影响作用的对比研究［J］.环境科学学报，2022，42（3）：257-267.
	LU Xiangyu， YU Haixiang， CHEN Ya，et al.Comparison of the effects of chemical flocculation and electric flocculation conditioning on sludge dewatering performance［J］.Acta Scientiae Circumstantiae，2022，42（3）：257-267.
22	王东星，唐弈锴，伍林峰.疏浚淤泥化学絮凝-真空预压深度脱水效果评价［J］.岩土力学，2020，41（12）：3929-3938.
	WANG Dongxing， TANG Yikai， WU Linfeng.Evaluation on deep dewatering performance of dredged sludge treated by chemical flocculation-vacuum preloading［J］.Rock and Soil Mechanics，2020，41（12）：3929-3938.
23	CHEN Yuxuan， SHUI Zhonghe， CHEN Wei，et al.Chloride binding of synthetic Ca-Al-NO₃ LDHs in hardened cement paste［J］.Construction and Building Materials，2015，93：1051-1058.
24	CAO Yanhui， ZHENG Dajiang， ZHANG Fan，et al.Layered double hydroxide（LDH） for multi-functionalized corrosion protection of metals：A review［J］.Journal of Materials Science & Technology，2022，38（7）：232-263.
25	YE Xiaofang， ZHAO Xiaodan， MING Qiang，et al.Process optimization to enhance utilization efficiency of precipitants for chloride removal from flue gas desulfurization wastewater via Friedel′s salt precipitation［J］.Journal of Environmental Management，2021，299：113682.

样品	层间距/Å	晶粒尺寸/nm
NaCl	7.78	52.2
CaCl₂	7.84	50.4
MgCl₂	7.82	276.3

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Study on effect of cations on properties of chloride removal products by Friedel′s salt process

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